Digital cameras capture their images on a silicon semiconductor
referred to as a digital sensor. This sensor is composed of an array of
photosensitive diodes called photosites that capture photons (subatomic
light particles) and converts them to electrons, much like solar panels
convert light to energy. This build up of electrons in each photo site is
converted to a voltage which in turn is converted to digital data as a
picture element or ‘pixel’. These pixels are then relayed in consecutive
order and stored as an image on the camera’s memory as a file. These
files can then be viewed on the camera in the LCD screen, or uploaded to
a computer where they can also be viewed or manipulated with imaging
software.
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